Sourabh Ranjan Kar

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About Me

Sourabh Ranjan Kar

Full-Stack Engineer

Full-Stack Engineer with 3+ years of experience building secure, scalable microservices and responsive UIs in fintech and logistics. I specialize in Java/Spring Boot, React/TypeScript, and AWS, delivering platforms that process 2M+ transactions/month with 99.95% uptime.

Currently working at Fifth Third Bancorp, I've engineered KYC verification flows, designed REST APIs, and deployed Dockerized microservices on AWS ECS. Previously at FedEx, I delivered shipment-tracking modules serving multiple countries across AMEA regions.

AWS Certified Developer with expertise in event-driven architecture, infrastructure-as-code, and CI/CD automation. I'm passionate about building performant solutions that enhance reliability, user experience, and regulatory compliance.

Frontend

React TypeScript Redux Angular

Backend

Java Spring Boot REST APIs Microservices

Cloud & DevOps

AWS Docker Kubernetes CI/CD

Databases

PostgreSQL MySQL MongoDB Azure SQL

Key Projects & Achievements

Professional projects delivered at Fifth Third Bancorp and FedEx, showcasing expertise in building scalable, secure, and high-performance enterprise applications.

Fifth Third Bancorp

Digital Onboarding Platform

Engineered KYC verification flow and onboarding dashboard integrating LexisNexis APIs for AML compliance checks, reducing account setup time by 20% while improving completion rates for financial services customers.

React TypeScript Spring Boot AWS RDS Redux
Fifth Third Bancorp

Enterprise REST API Gateway

Designed and enhanced REST APIs with pagination, idempotency, and caching strategies behind AWS API Gateway, improving reliability and performance for high-volume banking workloads processing 2M+ transactions monthly.

Spring Boot JPA API Gateway PostgreSQL AWS SQS
Fifth Third Bancorp

Cloud-Native Microservices

Deployed Dockerized microservices on AWS ECS (Fargate) with blue/green rollouts via CodePipeline and CloudWatch/X-Ray monitoring, moving releases from weekly to daily cycles and reducing mean time to recovery.

Docker AWS ECS CloudFormation CodePipeline X-Ray
FedEx AMEA

Real-Time Shipment Tracking

Delivered shipment-tracking modules for AMEA logistics using Angular and Spring Boot, enabling real-time tracking across multiple countries with WebSockets, RxJS, and Kafka-powered event streaming for international operations.

Angular Spring Boot WebSockets Kafka NgRx
FedEx AMEA

Multilingual Logistics Platform

Created multilingual Angular frontend with Angular Material, ngx-translate, and reactive forms where A/B testing increased engagement and usability for diverse regions across Asia, Middle East, and Africa markets.

Angular Material i18n RxJS Azure SQL
FedEx AMEA

Enterprise Security Implementation

Strengthened backend security by integrating Spring Security, OAuth2, JWT, and RBAC into Spring Boot microservices, reducing vulnerabilities by 35% following penetration test remediation and security audits.

Spring Security OAuth2 JWT RBAC

Experience & Education

Full Stack Developer

Fifth Third Bancorp

Oct 2024 - Present
  • Engineered KYC verification flow and onboarding dashboard reducing account setup time by 20%
  • Enhanced REST APIs with pagination, idempotency, and caching for high-volume workloads
  • Optimized AWS RDS with partitioning and indexing, boosting query performance by 40%
  • Deployed Dockerized microservices on AWS ECS with blue/green rollouts via CodePipeline
  • Reduced production defects by 30% with standardized testing and gated CI/CD releases

Full Stack Developer

Federal Express Corporation (FedEx)

Jan 2021 - Jul 2023
  • Delivered shipment-tracking modules for AMEA logistics enabling real-time tracking
  • Created multilingual Angular frontend where A/B tests increased engagement
  • Implemented real-time shipment updates with WebSockets, RxJS, and NgRx
  • Strengthened backend security with Spring Security, OAuth2, JWT, reducing vulnerabilities by 35%
  • Reduced deployment cycles from 2 days to 6 hours with enhanced CI/CD pipeline

Master of Science

University of North Texas

Aug 2023 - May 2025
  • Advanced Data Analytics
  • Focus on Machine Learning, Big Data, and Statistical Analysis
  • Location: Denton, Texas

Bachelor of Science

Loyola Academy Degree and PG College

Jun 2017 - Nov 2020
  • Computer Science and Engineering
  • Strong foundation in algorithms, data structures, and software development
  • Location: India

AWS Certified Developer - Associate

Amazon Web Services

Certified
  • Validated expertise in developing and maintaining AWS applications
  • Proficient in AWS services, deployment, and security best practices

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